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Hypopnea Clusters
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robanco Offline

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Posts: 7
Joined: Aug 2015

Machine: resmed autoset 10
Mask Type: Full face mask
Mask Make & Model: resmed fx
Humidifier: resmed airset 10
CPAP Pressure: 6-17
CPAP Software: SleepyHead

Other Comments: Retired Accountant

Sex: Male
Location: Sydney, Australia

Post: #1
Question Hypopnea Clusters
I have been on APAP now for 90 days with good results for OA and CA but I am still being plagued by Hypopnea. Last night for example 23 H events were recorded in 6:38, not a bad result you might say but the events are clustered, 3 events within 19 minutes again not too bad, then 8 events in 14 minutes, again 8 events in 28 minutes and a couple of isolated events to make up the total. Not only are these clustered but they are surprisingly regular with major clusters regularly betwen 1:30-2:00 AND 3:30-4:00.
Current settings are pressure min 6 max 17, EPR 3, Humidity and Line Temp on Auto.
09-21-2015 05:18 PM
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OpalRose Offline

Monitors

Posts: 3,168
Joined: Nov 2014

Machine: PR System One REMstar Auto 560 with A Flex
Mask Type: Nasal pillows
Mask Make & Model: AirFit P10 For Her
Humidifier: REMStar heated humidifier with heated hose
CPAP Pressure: Auto Cpap 10-13 AFLEX 1
CPAP Software: SleepyHead EncoreBasic

Other Comments: Started CPAP Therapy October 23, 2014

Sex: Female
Location: Northeast Ohio, USA

Post: #2
RE: Hypopnea Clusters
It could be just a matter of raising your minimum starting pressure a little. Mabye to 6.5 or 7 and watch for awhile.

OpalRose
09-21-2015 05:24 PM
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zonk Offline

Advisory Members

Posts: 7,908
Joined: Feb 2012

Machine: A10 AutoSet
Mask Type: Nasal mask
Mask Make & Model: Activa LT
Humidifier: Integrated /ClimateLineAir
CPAP Pressure: 9/13
CPAP Software: ResScan

Other Comments: CPAP since Nov 2010

Sex: Male
Location: Australia

Post: #3
RE: Hypopnea Clusters
(09-21-2015 05:18 PM)robanco Wrote:  Current settings are pressure min 6 max 17, EPR 3, Humidity and Line Temp on Auto.
What is the median, 95th percentile, and maximum pressure and leak?
I prefer to set my minimum pressure close to the 95th percentile so pressure doesn't have to climb a great deal to deal with any events and not a lot of variation in pressure during the night ... YMMV

I'm not fan of EPR and don't think necessary if on variable pressure, I would turn it off
Some people might disagree, that is normal, everyone is different

As for humidity, I set the control on manual ... tube temp 23C - humidity 3, no rainout
On auto, the air feel too warm for me, unlike later models, tube temp is not adjustable on my machine ...
What is good from someone, not necessarily good for someone else
09-21-2015 05:54 PM
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justMongo Offline

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Posts: 3,847
Joined: Sep 2013

Machine: ResMed VPAP Auto (S9)
Mask Type: Full face mask
Mask Make & Model: ResMed Mirage Quattro
Humidifier: ResMed H5i
CPAP Pressure: 18 IPAPmax - 11 EPAPmin, PS=5
CPAP Software: Other Software

Other Comments: μολὼν λαβέ

Sex: Male
Location: Калифорния

Post: #4
RE: Hypopnea Clusters
All good advice above... In my own words:

Use the software and see where the pressure is for the clusters of hypos. I'd wager it's when the autoset has retreated on pressure.
If so, then raising the min pressure would likely reduce clustering.

Also, look at your high sample rate flow data to see if it's reduced in amplitude during the time frame of the clusters -- another indication partial airway restriction.

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09-21-2015 07:36 PM
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